PT-2022-10774 · Google+1 · Android Q Sdk+1

Published 2022-01-18 · Updated 2022-01-26 · CVE-2021-38785

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Allwinner R818 SoC Android Q SDK V1.0

Description The issue is related to a NULL pointer deference in the camera driver /dev/cedar dev. This could be exploited using the ioctl cmd IOCTL GET IOMMU ADDR to cause a system crash.

Recommendations For Allwinner R818 SoC Android Q SDK V1.0, consider disabling the ioctl cmd IOCTL GET IOMMU ADDR as a temporary workaround until a patch is available. Restrict access to the /dev/cedar dev camera driver to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2021-38785

Affected Products

Allwinner R818 Soc

Android Q Sdk

References · 8

• 🔥 https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9ACamera%20Driver%20has%20Null%20Pointer%20Dereference%20Vulnerability.md · Exploit
• https://allwinnertech.com/index.php?c=product&a=index&id=92 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-38785 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-38785 · Security Note
• https://cnvd.org.cn/flaw/show/CNVD-2021-49170 · Note
• https://t.me/cibsecurity/35692 · Telegram Post
• https://vul.wangan.com/a/CNVD-2021-49170 · Note
• https://t.me/cvenotify/25576 · Telegram Post